import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main6 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        int a = in.nextInt();
        int b = in.nextInt();
        int c = in.nextInt();
        int d = in.nextInt();

        int n = in.nextInt();
        int totalCost = 0;
        for(int i = 0;i<n;i++){
            int xi = in.nextInt();
            int yi = in.nextInt();

            int disbo = Math.abs(xi-a) + Math.abs(yi-b);

            int distar = Math.abs(xi-c) + Math.abs(yi-d);
            totalCost += disbo + distar;
        }
        System.out.println(totalCost);
        
    }
}